GB28157-2011
Acephate emulsifiable concentrates
乙酰甲胺磷乳油
GB 28157-2011 is a current mandatory Chinese national standard for Acephate emulsifiable concentrates. It appears in the Food compliance cluster with a product safety focus and has an implementation date of Apr 15, 2012.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to acephate emulsifiable concentrates formulated by dissolving acephate technical concentrate with emulsifiers in suitable solvents. It covers the requirements, testing methods, and labeling for both 30% EC and 40% EC formulations. It is not applicable to other pesticide formulations or different active ingredients.
Technical requirements
The standard specifies the physical and chemical requirements for acephate emulsifiable concentrates, including appearance, active ingredient content, and impurity limits. The product must be a stable, homogeneous liquid without visible suspended matter or sediment. It sets strict limits for the active ingredient, acephate, as well as maximum thresholds for specific impurities including acetamide, methamidophos, and O,O,S-trimethyl phosphorothioate. These limits vary depending on whether the formulation is 30% or 40%. Additionally, the standard regulates water content and acidity to ensure chemical stability during storage. Manufacturers must ensure their products meet these mandatory parameters before entering the Chinese market. The document also outlines requirements for emulsion stability, low-temperature stability, and thermal storage stability to guarantee product performance under various environmental conditions.
Testing methods
- High-Performance Liquid Chromatography (HPLC): Used for the identification and quantitative determination of acephate, acetamide, methamidophos, and O,O,S-trimethyl phosphorothioate. - Karl Fischer Method: Referenced from GB/T 1600 for determining the water content. - Acid-Base Titration: Used to measure the acidity mass fraction, calculated as sulfuric acid. - Emulsion Stability Test: Conducted by diluting the sample 200 times with standard hard water according to GB/T 1603. - Thermal and Low-Temperature Stability Tests: Evaluated using methods specified in GB/T 19136 and GB/T 19137 to assess product shelf-life and physical stability.
FAQs
What products are regulated under GB 28157-2011?
GB 28157-2011 regulates acephate emulsifiable concentrates, specifically the 30% and 40% formulations. It applies to products made from acephate technical concentrate dissolved in suitable solvents with emulsifiers.
Are there any mandatory chapters in GB 28157-2011?
Yes, Chapter 3 (Requirements) and Chapter 5 (Labeling, Packaging, Storage, and Transport) are mandatory. Compliance with the technical indicators and labeling requirements is legally required for market access.
How is the active ingredient content tested in this standard?
The active ingredient, acephate, and its impurities are tested using Reverse-Phase High-Performance Liquid Chromatography (HPLC) with a C18 column and a UV detector at 210nm, as detailed in the standard.
The summary above provides a high-level overview of GB 28157-2011. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 28157-2011 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- G25
- ICS
- 65.100.10
- Competent department
- Ministry of Agriculture and Rural Affairs
- Technical committee
- Ministry of Agriculture and Rural Affairs